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CERTIFIED EASA/BCAA PART BE-CAMO-0021
Modifications & 
Design Engineering (EASA Part-21).

Strewreib delivers certified aircraft design and engineering solutions under EASA Part-21 and applicable international frameworks. 

We support airlines, lessors, and owners with approved design changes, repairs and modifications that enhance aircraft functionality while ensuring full regulatory compliance.

From cabin reconfigurations to complex structural or avionics modifications, our engineering expertise ensures each change is technically sound, efficiently managed, and fully approved.     




Key Services Within this Solution.

We develop approved minor modifications and repairs in full compliance with EASA Part-21 and applicable international regulatory frameworks.  

We manage and coordinate STC projects, supporting data collection, certification activities, authority interaction and approval for major aircraft modifications.  

We design and certify cabin layouts, seating configurations, monuments, galleys, lavatories, branding elements and interior changes aligned with operator and lease requirements.  

We develop approved engineering data for avionics upgrades, connectivity installations, system modifications and equipment integration.   

We provide structural assessments, damage evaluations, stress analyses and approved repair data for both temporary and permanent structural solutions. 

We update aircraft weight and balance documentation and performance data following modifications, repairs or configuration changes.

We prepare engineering packages and ensure regulatory compliance for engine or APU replacements, configurations and related technical changes.  

We deliver structured digital engineering files, drawings, compliance reports, and configuration data to ensure long-term traceability and authority alignment. 

We assess technical feasibility, certification implications, timelines and asset impact of proposed modifications to support informed decision-making before project launch. 


A Proven 
Track Record.

Our engineering and design services combine certified competence with practical, project-driven execution. We provide clear technical data, efficient coordination, and certified approvals, ensuring every modification is safe, compliant, and aligned with operational and commercial requirements.

+23 Years

In Business. 

+255 Years

Combined Team Expertise.

+400

Succesful projects delivered.

+100

Trusted Aviation Partners.

Planning a modification or certification project?

Let’s discuss your modification requirements and certification path to ensure compliant, efficient and future-proof engineering solutions.  ​

Let's discuss your modification project >